In ran into that couple times this morning throwing real wet heavy snow. Lifted the snow thrower just a little, like 1/2" and that took care of the problem. I have Ag tires, chains and fluid and 220 in the seat. Gas tank in over the motor and only about 1.5 gallons. Had very little slippage except when turning around in that 7" of wet stuff. I have also run into that situation with by IH 400 when moving snow with a 5' bucket and chains on. I think it is a situation that is going to happen when conditions are just right. As long as I was going straight it was not a problem.